Ok
YSS are crap made in china and sold as the best...not so, I've been down this road on several occasions and the choice is limited
So what do you do, first if you can find a set of original Koni's then they are the pick of the cheeper end, you'll still pay $200-$300 for excellent condition shocks and they come up on EvilBay quite regularly and can be rebuilt, if needed.
Hagon I've heard good and bad reports about them and the build quality is average and performance is on par with YSS.
Ikon assembled in Australia from imported and local parts (china) and are a copy of the Koni (in fact they are Koni's as Koni sold the licence etc to build them and they are now called Ikon's) cost $300ish + and are of good quality think top end of the cheeper new shocks.
Redwings, made in Japan from the 60's on and still can be seen on Evilbay for around $130ish NOS, good quality and good value, but rember these may have been sitting around for up 40 years so the oil may have degraded and is of a lesser quality then modern oils, i believe these can't be rebuilt , may be wrong though ;D
then there is the rest Ohlin's (since 1976 will be NOS if you can find any) Girling same a Ohlins, Marzocchi brilliant shock and rebuildable once again NOS or second hand and rebuild and the list goes on Ceraini, Eagle etc. Don't forget Showa as they made some good OEM shocks, 1980's CB900f etc had good shocks.
Rod from OZ 8)
So what do you want to pay and is the bike for show or go
is the answer to your Question!
make sure you get the right length!! sounds silly, but they had two attempts at suppling mine for the 450K2 
